4.5 mm Pump Q-6.5 L/s 8. A pump is located 4.5 m to one side of, and 3.5 m above, a reservoir. The pump is designed for a flow rate of 6 L/s. For satisfactory operation, the static pressure at the pump inlet must not be lower than -6 m of water gage (note, this is like mm of water for pressure, just in meters). Determine the smallest standard commercial steel pipe that will give the required performance. Water 5°C 3.5 m 90° elbows